# ref: https://s-nako.work/2020/12/how-to-pass-arguments-to-custom-operator-in-blender-python/
class ADDMATRIX_add_cube(bpy.types.Operator):
    bl_idname = 'add_matrix_obj.add_cube'
    bl_label = "Add matrix cube"
    bl_options = {'REGISTER', "UNDO"}

    input1: bpy.props.IntProperty() # add argument1 as property "input1"
    input2: bpy.props.IntProperty() # add argument2 as property "input2"

    def execute(self, context):
        for xi in range(self.input1):
            x = xi*1.2
            for yi in range(self.input2):
                y = yi*1.2
                bpy.ops.mesh.primitive_cube_add(size=0.5, enter_editmode=False, align='WORLD', location=(x, y, 0))
        return {'FINISHED'}